A family of Microsoft word processing software products for creating web, email, and print documents.
It is a bit complicated but...
You could save multiple versions of the date picker control as multiple building blocks with alternate formats and then use a Building Blocks Gallery Content Control in your document to allow the user to pick from those formats.
Better might be CreateDate fields saved as building blocks in the different formats.
You can set the Building Blocks Gallery Content Control to be deleted upon editing. (I.e., once a choice is made, it is no longer a CC. If the building blorks, themselves, are Content Controls, the one chose would be there.
I am assuming that you are working with a template, not a document. When that is used to create a new document, any CreateDate field will reflect the date the document is created, not the date the template is created.
- Using Date Fields in Microsoft Word
- Where can Building Blocks be stored?
- Building Blocks Gallery Content Control
- Templates in Microsoft Word
If you want to see how this works, here is a temporary link to a macro-free template that demonstrates the use of building blocks and the Building Blocks Gallery Content Control. It has two such controls, one that gives various date pickers, and the other gives various CreateDate fields formatted with three different date formats. https://www.dropbox.com/scl/fi/qkscfsc6e8mcmzps4kwae/Date-Format-Pick-in-Building-Blocks-Gallery.dotx?rlkey=x5gxq5vdaxvj2uc7lnfk692py&dl=0